Given that this doesn’t look uniform, it looks ‘random’ – you need to check that your hot end is actually secure against the X carriage.

If this were uniform, like it faded out from a low spot - I’d tell you there was debris under the bed, or a mis-measure on the probe (it happens, they aren’t perfect)

ABL isn’t a solution for leveling problems. ABL is a ‘lazy’ test for an already-well-tuned printer. If you’re having leveling issues, an ABL won’t work right because it assumes everything is working perfectly to begin with.